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对采自江西德兴西湾钠长花岗岩的样品进行了激光质谱４０Ａｒ／３９Ａｒ年龄测定，得到等时年龄为（９２７９±１８６）Ｍａ。该年龄代表了赣东北蛇绿岩套中浅色侵入体部分的钠长花岗岩冷却到３５０℃左右时的结晶年龄，把它作为该蛇绿岩套形成时代的上限。结合近年来已经发表的有关该区蛇绿岩套的ＳｍＮｄ、ＵＰｂ和４０Ａｒ／３９Ａｒ同位素年龄数据，本文就该蛇绿岩套的形成年龄和构造侵位年龄进行了讨论。
The 40Ar / 39Ar dating of the samples collected from the West Longyan granite in Dexing, Jiangxi Province was carried out and the isochron age was found to be 9279 ± 186 Ma. This age represents the crystallization age when the sodium-bearing granites in the light-green intrusive part of the ophiolite suite in northeastern Jiangxi cooled to about 350 ° C as the upper limit of the age of the ophiolite formation. Combined with the published data of SmNd, UPb and 40Ar / 39Ar isotope ages of ophiolite sets in this area, the age of formation and age of tectonic emplacement of the ophiolite sets are discussed in this paper.